55921474 has 8 divisors (see below), whose sum is σ = 95865408. Its totient is φ = 23966340.

The previous prime is 55921423. The next prime is 55921501. The reversal of 55921474 is 47412955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55921474² = 6254422508665352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997182 + ... + 1997209.

It is an arithmetic number, because the mean of its divisors is an integer number (11983176).

Almost surely, 2^55921474 is an apocalyptic number.

55921474 is a deficient number, since it is larger than the sum of its proper divisors (39943934).

55921474 is a wasteful number, since it uses less digits than its factorization.

55921474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994400.

The product of its digits is 50400, while the sum is 37.

The square root of 55921474 is about 7478.0661938766. The cubic root of 55921474 is about 382.4073257191.

The spelling of 55921474 in words is "fifty-five million, nine hundred twenty-one thousand, four hundred seventy-four".